Born in Oldham, 46-year-old Cox studied at Manchester University, where he joined the band D:Ream. He is a particle physicist, but better known as a presenter of television programmes such as Wonders Of The Universe. His latest series, Human Universe, starts on BBC2 on Tuesday at 9pm. He lives with his wife, stepson and son in London.

When were you happiest? Now. Middle age has made me more relaxed.

What is your earliest memory? Playing in my grandad’s garden in Oldham.

What is the trait you most deplore in others? Certainty.

What was your most embarrassing moment? Appearing on Top Of The Pops in a tartan suit with just a waistcoat.